1 files changed, 3 insertions, 3 deletions
diff --git a/test/core/util/debugger_macros.cc b/test/core/util/debugger_macros.cc
index d344c3fb74..f1e4ffd3af 100644
--- a/test/core/util/debugger_macros.cc
+++ b/test/core/util/debugger_macros.cc
@@ -37,16 +37,16 @@ grpc_stream* grpc_transport_stream_from_call(grpc_call* call) {
     grpc_call_element* el = grpc_call_stack_element(cs, cs->count - 1);
     if (el->filter == &grpc_client_channel_filter) {
       grpc_subchannel_call* scc = grpc_client_channel_get_subchannel_call(el);
-      if (scc == NULL) {
+      if (scc == nullptr) {
         fprintf(stderr, "No subchannel-call");
-        return NULL;
+        return nullptr;
       }
       cs = grpc_subchannel_call_get_call_stack(scc);
     } else if (el->filter == &grpc_connected_filter) {
       return grpc_connected_channel_get_stream(el);
     } else {
       fprintf(stderr, "Unrecognized filter: %s", el->filter->name);
-      return NULL;
+      return nullptr;
     }
   }
 }